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Finding the Fourth Proportional to 628,126,981.80, 866,821,649.34 and 345,895,667.89

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Solution

The fourth proportional to 628,126,981.80, 866,821,649.34 and 345,895,667.89 is: 477,339,553.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,126,981.80 : 866,821,649.34 = 345,895,667.89 : x
  2. Step 2: Convert to fraction form
    628,126,981.80/866,821,649.34 = 345,895,667.89/x
  3. Step 3: Cross multiply
    628,126,981.80x = 866,821,649.34 × 345,895,667.89
  4. Step 4: Simplify right side
    628,126,981.80x = 299,829,853,339,100,736
  5. Step 5: Solve for x
    x = 299,829,853,339,100,736/628,126,981.80
  6. Step 6: Final answer
    x = 477,339,553.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.